User talk:Chesapeake77
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You should click on this photo ^^^ before you move on.
A very useful guide: Wikipedia:Reliable sources/Perennial sources
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/NASA_Earth_America_2002.jpg/640px-NASA_Earth_America_2002.jpg)
You should click on this photo ^^^ before you move on.
A very useful guide: Wikipedia:Reliable sources/Perennial sources